Check if list is empty in C#
I have a generic list object. I need to check if the list is empty. How do I check if a `List<T>` is empty in C#?
- Modified
- 25 Aug at 19:38
Specifying a custom DateTime format when serializing with Json.Net
I am developing an API to expose some data using ASP.NET Web API. In one of the API, the client wants us to expose the date in `yyyy-MM-dd` format. I don't want to change the global settings (e.g. `G...
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- 23 May at 19:29
How to declare a constant map in Golang?
I am trying to declare to constant in Go, but it is throwing an error. This is my code: ``` const myMap = map[int]string{ 1: "one", 2: "two", 3: "three", } ``` This is the error ``` map[i...
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- 23 Dec at 08:29
How to store arrays in MySQL?
I have two tables in MySQL. Table Person has the following columns: | id | name | fruits | | -- | ---- | ------ | The `fruits` column may hold null or an array of strings like ('apple', 'orange',...
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- 15 Jun at 23:32
Missing return statement in a non-void method compiles
I encountered a situation where a is missing a statement and the code still compiles. I know that the statements after the while loop are (dead code) and would never be executed. But why doesn't th...
Value cannot be null. Parameter name: source
This is probably the biggest waste of time problem I have spent hours on solving for a long time. ``` var db = new hublisherEntities(); establishment_brands est = new establishment_brands(); est.bra...
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- 9 Dec at 17:22
What is the minimum length of a valid international phone number?
I need to validate user input of an international phone number. According to [E.164](https://en.wikipedia.org/wiki/E.164), the maximum length is 15 digits, but I was unable to find any information abo...
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- 3 Oct at 23:9
Node.js: Difference between req.query[] and req.params
Is there a difference between obtaining QUERY_STRING arguments via `req.query[myParam]` and `req.params.myParam`? If so, when should I use which?
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- 3 Oct at 07:15
Add a common Legend for combined ggplots
I have two ggplots which I align horizontally with `grid.arrange`. I have looked through a lot of forum posts, but everything I try seem to be commands that are now updated and named something else. ...
How to crop an image using PIL?
I want to crop image in the way by removing first 30 rows and last 30 rows from the given image. I have searched but did not get the exact solution. Does somebody have some suggestions?
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- 22 May at 09:13
Merge 2 arrays of objects
Lets have a look at an example. ``` var arr1 = new Array({name: "lang", value: "English"}, {name: "age", value: "18"}); var arr2 = new Array({name : "childs", value: '5'}, ...
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- 15 Feb at 21:57
BigDecimal equals() versus compareTo()
Consider the simple test class: ``` import java.math.BigDecimal; /** * @author The Elite Gentleman * */ public class Main { /** * @param args */ public static void main(String[...
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- 22 Jul at 08:52
How to get a substring between two strings in PHP?
I need a function that returns the substring between two words (or two characters). I'm wondering whether there is a php function that achieves that. I do not want to think about regex (well, I could ...
Stretch background image css?
``` <td class="style1" align='center' height='35'> <div style='overflow: hidden; width: 230px;'> <a class='link' herf='' onclick='topic(<?=$key;?>)'> <span id='name<?=$key;?>'><?=$name;?><...
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- 20 Apr at 10:46
In Python, how does one catch warnings as if they were exceptions?
A third-party library (written in C) that I use in my python code is issuing warnings. I want to be able to use the `try` `except` syntax to properly handle these warnings. Is there a way to do this? ...
How to pass table value parameters to stored procedure from .net code
I have a SQL Server 2005 database. In a few procedures I have table parameters that I pass to a stored proc as an `nvarchar` (separated by commas) and internally divide into single values. I add it to...
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- 16 Mar at 20:14
How to use WPF Background Worker
In my application I need to perform a series of initialization steps, these take 7-8 seconds to complete during which my UI becomes unresponsive. To resolve this I perform the initialization in a sepa...
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- 21 Oct at 14:40
Use JAXB to create Object from XML String
How can I use the below code to unmarshal a XML string an map it to the JAXB object below? ``` JAXBContext jaxbContext = JAXBContext.newInstance(Person.class); Unmarshaller unmarshaller = jaxbContext...
$(window).scrollTop() vs. $(document).scrollTop()
What's the difference between: ``` $(window).scrollTop() ``` and ``` $(document).scrollTop() ``` Thanks.
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- 20 Mar at 21:50
Rename Files and Directories (Add Prefix)
I would like to add prefix on all folders and directories. Example: I have ``` Hi.jpg 1.txt folder/ this.file_is.here.png another_folder.ok/ ``` I would like to add prefix "PRE_" ``` PRE_Hi.jpg PRE_1...
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- 30 Dec at 12:46
How to get datetime in JavaScript?
How to get date time in JavaScript with format 31/12/2010 03:55 AM?
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- 23 Jul at 14:57
Find indices of elements equal to zero in a NumPy array
NumPy has the efficient function/method [nonzero()](http://docs.scipy.org/doc/numpy/reference/generated/numpy.nonzero.html) to identify the indices of non-zero elements in an `ndarray` object. What is...
What does this square bracket and parenthesis bracket notation mean [first1,last1)?
I have seen number ranges represented as `[first1,last1)` and `[first2,last2)`. I would like to know what such a notation means.
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- 26 Apr at 17:37
Fixed Table Cell Width
A lot of people still use tables to layout controls, data etc. - one example of this is the popular jqGrid. However, there is some magic happening that I cant seem to fathom (its tables for crying out...
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- 10 Dec at 18:21
JavaScript: How to join / combine two arrays to concatenate into one array?
I'm trying to combine 2 arrays in javascript into one. ``` var lines = new Array("a","b","c"); lines = new Array("d","e","f"); ``` This is a quick example, i want to be able to combine them so that...
- Modified
- 12 Jul at 12:27